Reactions of (arene)tricarbonylchromium stabilized carbocations with aromatics and β-dicarbonyl compounds
作者:Motokazu Uemura、Tatsuya Minami、Yuji Hayashi
DOI:10.1016/0022-328x(86)84039-6
日期:1986.1
Primary and secondary benzylic carbocations, stabilized by a tricarbonyl-chromium group, gave coupling products with several aromatics or β-dicarbonyl compounds in good yield and this reaction presents a new synthetic method for carbon-carbonbondformation. The chromium complexes of tertiary benzyl alcohols gave dehydrated products without carbon-carbon coupling products under similar conditions.
Simple and efficient procedure for alkylation of aromatics from alcohols in the presence of NaHSO4/SiO2 was developed. Various triaryl methanes were obtained in good yields in short reaction time. For instance the reaction of mesitylene with benzhydrol in the presence of NaHSO4/SiO2 gave the corresponding triaryl methane in a quantitative yield. NaHSO4/SiO2 was regenerated by simple treatment and could
Structural requirements for ipso-nitration with cerium(IV) ammonium nitrate (CAN)
作者:H. Asghedom、R.T. LaLonde、F. Ramdayal
DOI:10.1016/s0040-4039(02)00743-8
日期:2002.5
in which the carbon skeleton contains at least a diarylmethane with the aromatic rings appropriately substituted by electron donating groups exhibited ipso-nitration when treated with cerium(IV) ammoniumnitrate (CAN).